diff options
Diffstat (limited to 'sql/opt_range.cc')
| -rw-r--r-- | sql/opt_range.cc | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc index 8f8767c10b3..54c0c5bba96 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -9369,7 +9369,7 @@ key_or(RANGE_OPT_PARAM *param, SEL_ARG *key1,SEL_ARG *key2) uint max_part_no= MY_MAX(key1->max_part_no, key2->max_part_no); - for (key2=key2->first(); key2; ) + for (key2=key2->first(); ; ) { /* key1 consists of one or more ranges. tmp is the range currently @@ -9383,6 +9383,16 @@ key_or(RANGE_OPT_PARAM *param, SEL_ARG *key1,SEL_ARG *key2) ^ tmp */ + if (key1->min_flag & NO_MIN_RANGE && + key1->max_flag & NO_MAX_RANGE) + { + if (key1->maybe_flag) + return new SEL_ARG(SEL_ARG::MAYBE_KEY); + return 0; // Always true OR + } + if (!key2) + break; + SEL_ARG *tmp=key1->find_range(key2); /* @@ -9453,6 +9463,13 @@ key_or(RANGE_OPT_PARAM *param, SEL_ARG *key1,SEL_ARG *key2) key2->copy_min(tmp); if (!(key1=key1->tree_delete(tmp))) { // Only one key in tree + if (key2->min_flag & NO_MIN_RANGE && + key2->max_flag & NO_MAX_RANGE) + { + if (key2->maybe_flag) + return new SEL_ARG(SEL_ARG::MAYBE_KEY); + return 0; // Always true OR + } key1=key2; key1->make_root(); key2=key2_next; |